Here is the step to reproduce:
1- log as an admin
2- create an albums
3- go to the album list and edit album properties
4- change 'Album can be viewed by' to 'Members of registered group'
then an admin cannot edit/delete the album (neither users of registered group can!)
--> no one can manage it!
Probably the solution is that users of admin group SHOULD be able to view/manage every albums...
In config, change 'Show private album icon to unlogged user' to YES.
Admin then can see the icon, and when goes to the category, can edit etc, and can see the pics.
Thanks that worked... even if it's not exactly the behavior I expected :?